Shell Fork Bomb
Feb 7, 2007
I'm getting errors when I try to run perl scripts from my SSH command line. Following is the console output. (Please note that I could run this script with no problem last night.)
Code:
gcoates@server [~/public_html/gimage-test/cgi-bin]# ./post_invoices 2004
sh: fork: Resource temporarily unavailable
sh: fork: Resource temporarily unavailable
ERROR: Date::Manip unable to determine TimeZone.
at /usr/lib/perl5/site_perl/5.8.5/Date/Manip.pm line 3635
Date::Manip::Date_TimeZone called at /usr/lib/perl5/site_perl/5.8.5/Date/Manip.pm line 676
Date::Manip::Date_Init() called at /usr/lib/perl5/site_perl/5.8.5/Date/Manip.pm line 799
Date::Manip::ParseDateString('now') called at /usr/lib/perl5/site_perl/5.8.5/Date/Manip.pm line 1791
Date::Manip::UnixDate('now', '%Y-%m-%d %H:%M:%S') called at gImage/Util.pm line 13
gImage::Util::get_current_time() called at gImage/Invoice.pm line 413
gImage::Invoice::post_invoice('gImage::Invoice=HASH(0x9ae0e1c)', 1) called at ./post_invoices line 24
Issuing rollback() for database handle being DESTROY'd without explicit disconnect().
For obvious reasons I do not wish to disable shell fork bomb protection. This is a shared server after all.
I stopped, restart sshd but that did not help.
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Dec 9, 2007
What is forking, it's taking a bite out of apache processes:
[url]
[url]
Load was at 8 just before the fork:
[url]
But it's a quad core and wasn't swapping
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We're in the process of setting up our new VPS Server, and we can create a VPS with 256MB memory and with 512MB memory fine, but when creating one with 1GB memory, we get the error:
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Even though the server has 4GB RAM and no other VPS's running. Any ideas?
Thanks.
[Edit]We now seem to get the problem for all our VPS's. I think it may be something to do with the Server not unallocating the memory, as we've provisioned and de-provisioned quite a few Servers
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[url]
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#!/bin/sh
echo()
{
/sbin/ip route add blackhole 198.87.51.13
/sbin/ip route add blackhole 63.78.151.98
/sbin/ip route add blackhole 58.71.22.77
exit 0;
}
#Functionality: Run that and it blocks those IPs
----------------------------
This is the first time I am writing a shell script so bare with it...I'm not a systems admin by any means.
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